Composite leather belt.



C. E. CARPENTER.

COMPOSITE LEATHER BELT. APPLICATION FILED FEB. 5, T915.

1,1 60,04 1 Patented Nov. 9, 191.1

VEGETBLE 7449750 EdT/ff I/f I v WE V GRA/N 1` Mmmm MNA/[LfAW/ERM l A, FLESH A @ARLES coiiarosi'rn' newline BELT;

'specification 'afnemers Patent'.

To all fui/tom it 4may Concern :I

invented certa-in Iniproveinents in.

' `My .inve 'tion'.,frelatesfito 'eoi'nposite or builtu'p beltsv of leather ;and 4the;vobieet of I d .lfeet a "eonsiderably greater pull per square',

my .invention toV provide v-a'n improveleather prepared by the wellknoum .vege- L table tanna de by :numeral wltlr'leather'f'ma -tannage or, as itis more :familiarly iHH-Wn chrome tann'age.A j.. i

improved belt '141,5 made of plurality of plies'of vegetable` My improved.' 'eomposte vegetable and mineral.itanne'dleathen pos- 'greater stretch hence, f very heav-yhides, .a

.sessies 'a nurnber of'peculiar advantages. the f frst place, eral .tannage-is toughe'r,'stronger and more supple' .and yieldingV than n ivhilefleather 'made by minit is-a'lso 'suseeptibleof ext-ept; in' theA easev of belt -inade whollyl of vegetable tapnage,

' las t'o subst;

excessively, Lnd-.to narrow to such an .extent tially destroy its'value.; 4'Vegetable tanneddeather, on the .other hand,- is much vstiffer, v,has rela-tively :httlestreteli v vwith no tendenev'to narrow. 1n use, but `lacks side ivli By combining theseA respeotiveleathers in.

suppleness and is liable to craek' on the "grainn passing arounl smalljpulleys.

l ,the making', of 'my inliinoved composite Vbelt,

i fl. *takeadvantage. ol'. the .4.0

l'qfluilities which make each' of them peeluliarly]valuable and produce a belt thatr p a rtak'eeot' or' possesses the virtues ef'liilh' leathers while avoiding f their delieiencies-.

CAnrENfrnm on PHILADELrHIA, 'i PENNSYLVANIA there 'will beless leather, vtivo or moreas 'the ease another form ordinary composite leather .gether by a suitable cement there l'ieing' instant-es where- 'tv is' the belt'shollldslip i *Patente-d N-ov.v 9, 19,15.-

Appnqtignmed rebruary 5,1915. serial No'. 3:1072A side may be in engagement with the pulley where no slip is required l vegetable tanned leathen lnay be in engagementfwithqthe pulley ivhen'eonditions revqilire oiflt'i'is desired that slip -'shall take lplaee between-the belt and the pulley.

' belt with a'layer or desired, yand the jee vovf-1 n'in1er al tanned leaher" am able to sti-' v eure a-betteradherence to the pulley and efinch oit'.V Contact Vwith; thepulley. than under the lliest conditions "with belts' made Wholly of. vegetable :tanned leather, 'Should slip occur -ivhenfthe mineral tanned-leather side of 4the belt isil'n the pulley,

contactl'with I danger'of burning, thev mineral tannedleather iscapable of `withstanding .a- "temperature considerably higher than leather tanned by any'oi', the vegetable processes.

These and other features of .invention- `are more `fully describedflierenafter, referv aLWf v "en ee being; to the aceompanylng Figui-el; is asectionalview .nary belt iadefWhQl'ly -of'vegetable tanned leather Fig'.' 42, is a .similar sectional View iol"m a .two-ply 'composite v belt 'made in' accordtionalrvieiv of one forin'of three-ply coin-" po'slte' belt made -i'nvaeeordanee with my 1n'-A ventionfand l1 ig. 4,15' a of three-ply composite inventlon.

sectional view of made in accordance with my In', F 1g. 1, `which ,shows fore made, thek grain si'des 'of two-layers 1, 1, of vegetable tanned leather-"form the belt' since a section 'of an y90 belt as heretofouter' or external surfaces-of the belt, while the'iiesh sides that will insure proper engagement and contact throughout theirleugth.- i v lnA Figffl, which shows a sectional-view of in v improved Composite. vbelt, l 'represents a layer of leather made in the' ordinaryi'nanner witha vegetable tan'nzfge, such for instauee as that employed in makingthe 'beltshown in Fig. l` and is a' section 0f mineral'tanned leather: Athe two-sections of vegetable and mineral tanned leather being placed with' their flesh sides in Contact and .-:.\(-\j l'ed together b v rement ofproper chararte-rv or 'other suitablev means?V that sure .permanent'comieetion ot' Saidlether or surtaees are secured' towill in-v A"gation 'when subjected to. severey tensile Unless the cementitlous body hold-f f si rams.

2 I n I A 'A 1,1`60,0 41

part or core l ofvegetable tannedleather,

which is faced on'both sides with plies 2 of mineral tanned, leather. i By this constru'cfv tion Ifam enabled to produce a belt having a high. degree of suppleness, and further, one

-that is not susceptible of stretch.; at the same time a belt somade will not crack' or split, even when employed with pulleys-of small size/i' In some 'Instances Iw-inay employ .two layers of vegetable tanned leather l', l, with a single la yer of mineral tanned-leather '2 at `one side as clearly illustratedl in Figfe.l

' In my/m'ipro'vedbelt such as'l havedescribed,r the plies o-f leatherl being of differ? e'nt Atann'age are liable to differences in eloning the plies together `is elastic, there 'is v tone I prefer a saturated Solution of subdanger of such plies separating under the strain, but by the employment of an elastic,

water-proof cement, alldanger of separation v 1s lavoided and a belt so constructed possesses:

thevk greatest possible etti vlency.

While there are perhaps many cements available for 'l securing together plies of leather, :I 'ha-ve found'that an elastic, Water- -pi-'oofceineiit is the best material that canbe employed for securing togetherthe plies/of leather employed in makingany improved composit'e'beltfy There may be many formsv of \\ater-proot' celnentsl available for the purpose, but I prefer to use a cement composedjof gun cotton dissolved in acetone, or

any cement of the celluloid group. lVhen employing aicement of gun cotton and ace.-

stantially sixteen (1 6.) ounces of gun. cotton to one-.(1) gallon of acetone.

@In employinglthecementitious i body for `securing together. thev respective pliesv of leather; yI prefer to.p'reliminarily sizemor'` coat thesurfaces to b e united with a vthintb'ody of Ithe cement,\\v'hich surfaces are then allowed :to `set or become substantially dry. vThen the main .coating of cementy to effect the union of the plies isapphed to these prelimmarily coated surfaces, ,and after the plies have been placed together-.they may be subjected to pressure ,suitably applied until the eementltious body has acquired the desired set and effected permanent .union of the respective leathers.

Al compositeI beltuivhich includes aply of .mineral tamlied'lezlther and a ply of vegei table tanned.leather.has many advantages;

,that isjto'say` the vegetable tanned. leather eorrectsithel defects of the. mineral tanned leather.l and the mineral tanned leather co1'- irqets the defects ofthe. \p`vegetable tanned leather. -Mineral tanned leather when used a three-ply belt,` .such as by `itself hasa greater` tendency to stretch than 'vegetable tanned leather smce it does",f

able it to hold its Width under tension.

Vegetable tanned leather, however, havingeyo" firmness and greatbody enables the mineral tanned leather to' hold'ts full -Wdth'yand avoid stretch When cemented orgotherwlse permanently secured thereto.

. The mineral .tanned skin is materially softer than the vegetable tanned skin, andis particularly desirable for contact. with the', pulley when slippage. is. to be. avoided.v

While the mineral tanned `leather is also much tougher 'than the vegetable tanned-:58d

leather, any tendency' of the mineral tanned leather to stretch, due to its softness, would vbe resisted' bythe `,vegetable tanned leather. to Whichit is *firmlysecured, with the re-` sult of attaining all-of the advantages pos- 851y sessed by a'belt made ofthe best vegetable tanned leather, Whileavoiiding'all of the `disl i advantages of the same. fj' Y y reason of the supple. character of the mineral tanned leather, itwwill have a tend-` 'ency to cling more vtightlyeto the'pulle and there will be very much less likelihoo of any slip occurring.. In case of slip, 'however, the danger of burningivould be much i less since the lmineral tanned leather will stand amuch higher temperature than vegetable tanned leather; probably as .much as a difference ofl Or F.

Such a beltavhilehaving greater strength than a beltof the 4same number of plies ymade 100 of vegetable tanned-leather,y ivill be consid erabl'y lighter in weight and thereby effect economy. in the load ;l that is to say, there Will be Aless ,Weight of belt to be pulled.

,A great disadvantage inconnection with 1,05`

the use of l.vegetable tannedy leatherv belts. when made of a plurality of plies is because the grain side of the belt 1s so apt to crack.: i

when the belt is bent, especially Whenpass ing around kapsrnall pulley. This is entirely W avoidedby the use of a minera-l tanned skin,.f

as one, ofthe plies or layers. u l My in'iproved composite belt ivillbe far moresul-)plthan any double or triple composite vegetableltanned leather belt heretoforeiiiafle` and henceavill.l give better service when used in lconnection with small pullevsA particularly.those of Aelectric generators, andv others driven at lhigh spec-ds.

lfinally,.its economy in Weight with a gain in strength and efficiency .of action will `materially enhance its value 'without `increas ing the cost.

To sum up, my improved composite belt, 'l madeof independent layers or plies of vegctable tanned leather-and mineral tanned leather cenuynted y, together, is capable of iyideruse than the ordinary composite belts; it is sironger; it will llbt crack in: making 'short turns, passing over small pulleys and 13G" it Will not slip. when the face of the like slip when the vegetable tanned leather' face is in contact With the pulley; and finally, While having a greater degree of suppleness, it will not lose its Width in use, nor stretch.

'A particular advantage in belts of the character described, `when using a cement of the celluloid groiipto secure the sections of the belt together, is that the two plies ofi helts being of dierent tannage are at times apt to be of varied elongation when subject to severe tensile strengthand Where the ordinary cement is used the cement notbeiii'g so elastic is apt to partunder the strain, While with the cement such as is herein described, namely, a ceiiient of the celluloid group., there is no such effect.

l claim:

1. A composite belt made up of a plurality of sections ofmineral tanned leather and vegetable tanned leather, permanently secured together by a cement of the celluloid group.

2. A. compo-site belt made up of a plurality of sections or plies of leather perinanently secured together by a cement of the celluloid group.

3. A compositebelt made up of a section of vegetable tanned leather, and a section of mineral tanned leather, permanently secured together by a cement of the celluloid group.

4t. A composite belt made up of a plu- Copes of this patent may be obtained for vc cents each, by

ralityof sections orplvies of leather permanently secured together by a cement consist-- ing of gun cotton in solution with acetone.

5. A composite belt made up of a section of vegetable tanned leather, and a section of mineral tanned leather, permanently secured together -by un cotton in solution With acetone.

6, A composite belt made up of a Vsection of vegetable tanned leather, mineral tanned leatherhaving the flesh sides or surfaces of the same permanently cemented together by 4a cement of the celluloid group. y.

7. A composite laelt made up of vegetable tanned leather, and a section of mineral tanned leather, said sections having their grain sides outermost With their fiesh sides permanently secured together by a cement of the celluloidv group.

8. A. composite belt made up of vegetable tanned?` leather, and a section of mineral tanned leather, said sections having their grain sides outermost .With their flesh sides permanently secured together by a cement consisting ofugun cotton in solution With acetone.

ln testimony vvhereof,

naine to this specification, in two subscribing Witnesses.

CHARLES E. CARPENTER.

l.Witnesses v:

Gnonen H. MORGAN, CHARLES P. S'roonn have signed my addressing the f Commissioner of Patents,

Washington, D. G.

acement consisting of.

anda section of the presence of 

